咖啡由茜草科一种常绿灌木所结的果实加工而成。咖啡有“黑色金子”之美称,全球年消费量为茶叶的3倍。咖啡产于热带和亚热带,其原产地在非洲的埃塞俄比亚。早在公元前2000年,埃塞俄比亚的阿交族人就已经在咖法省的热带高原采摘和种植咖啡了,后来咖啡就逐渐成了人们的饮料。咖啡的名称来源于“咖法”这个地名。一提到咖啡,埃塞俄比亚人总是自豪地说:“咖啡是我们送给全世界的一件礼物。”而今南美洲的巴西是咖啡的最大生产国,其产量约占世界的三分之一。咖啡是一种结果早、可连续收获几十年、经济价值高的特种经济植物,干燥的咖啡种子中一般含有1%~2%的咖啡碱,咖啡的香味主要来自咖啡种子中的香精油和咖啡醇。在中国,海南、云南、广东、广西、福建和台湾等地已引种栽培。 饮用咖啡要讲究科学。早晨在咖啡中添加牛乳,既能提神又可增加营养;下班后喝上一杯,可加速脉搏跳动,消除疲惫,振奋精神;饭后喝上一杯,可促进肠胃蠕动,帮助消化。但孕产妇及胃病、皮肤病、心血管疾病患者,最好不要喝咖啡。 关于文中画线句子,理解正确的一项是:
A. 咖啡含有价格昂贵的香精油和咖啡醇
B. 咖啡是黑色的,具有很高的经济价值
C. 咖啡的经济价值可以和金子等同起来
D. 咖啡原产地为非洲,故名“黑色金子”
Part ADirections: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. Text 1 The swine flu will probably return in force earlier than seasonal flu usually begins, federal health officials predicted Friday, saying they expected it to erupt as soon as schools open rather than in October or November. The swine flu is still circulating in the United States, especially in summer camps, even though hot weather has arrived and the regular flu season ended months ago, "so we expect challenges when people return to school, when kids are congregating together," Dr. Anne Schuchat, director of respiratory diseases at the Centers for Disease Control and Prevention, said in a telephone news conference held jointly with vaccine experts from the Food and Drug Administration and the Department of Health and Human Services. It is still unclear how many doses of a swine flu vaccine will be available by then, and officials have been reluctant to make firm predictions beyond saying that they expect tens of millions, rather than hundreds of millions, and they plan to distribute them to people who are the most vulnerable, like pregnant women and people who are the most likely to encounter the flu, like health care workers. The number of doses available will depend on how fast seed strains grow, how much protection a small dose provides, and whether immune-system boosters called adjuvants are needed and prove to be safe; adjuvants are not used in American flu vaccines now. Clinical trials testing those questions are expected to take another couple of months, said Dr. Jesse L. Goodman, director of the F. D.A.’s Center for Biologics Evaluation and Research. Assuming a swine flu vaccination campaign begins, it will be voluntary, Dr. Schuchat emphasized, but she "strongly encouraged" pregnant women to get both a seasonal flu shot and a swine flu shot when they are available. The C.D.C.has been closely following the disease in the Southern Hemisphere winter, and it is mimicking the patterns seen in the United States and Mexico in the spring, she said. Most infections and most serious cases are in children and young adults, and those with underlying conditions, including pregnancy, are the most likely to die. Dr. Schuchat likened the spread’s unpredictability to that of popcorn: one city could see an explosion of cases and overwhelmed hospitals while another saw few. Her most important message, she added, was that "the virus isn’t gone, and we fully expect there will be challenges in the fall. " Which of the following is the most infective to this disease
A twelve-year old school boy.
B. A twenty-seven year old athlete.
C. A fifty-year old male gardener.
D. A forty-seven year old female driver.