Most plants can make their own food from sunlight, (1) some have discovered that stealing is an easier way to live, Thousands of plant species get by (2) photosynthesizing, and over 400 of these species seem to live by pilfering sugars from an underground (3) of fungi(真菌). But in (4) a handful of these plants has this modus operandi been traced to a relatively obscure fungus. To find out how (5) are (6) , mycologist Martin Bidartondo of the University of California at Berkeley and his team looked in their roots. What they found were (7) of a common type of fungus, so (8) that it is found in nearly 70 percent of all plants. The presence of this common fungus in these plants not only (9) at how they survive, says Bidartondo, but also suggests that many ordinary plants might prosper from a little looting, too.Plants have (10) relations to get what they need to survive. Normal, (11) plants can make their own carbohydrates through photosynthesis, but they still need minerals. Most plants have (12) a symbiotic relationship with a (13) network of what are called mycorrhizal fungi, which lies beneath the forest (14) . The fungi help green plants absorb minerals through their roots, and (15) , the plants normally (16) the fungi with sugars, or carbon. With a number of plants sharing the same fungal web, it was perhaps (17) that a few cheaters—dubbed epiparasites—would evolve to beat the system. (18) , these plants reversed the flow of carbon, (19) it into their roots from the fungi (20) releasing it as "payment.\ Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1.20()
A. instead of
B. in spite of
C. in place of
D. by contrast of
患者男性,60岁。上腹隐痛,日益加深的巩膜、皮肤发黄和瘙痒近2个月,纳差,便稀,乏力。体重减轻8kg。体检:消瘦,巩膜、皮肤明显黄染,肝肋下5cm,边缘钝,质中,无结节,无触痛,胆囊及脾均未触到,无移动性浊音。初步诊断为胰头或壶腹周围癌。 首选的诊断方法是
A. X线
B超
CT
D. 核素扫描
E. 选择性血管造影
患者男性,36岁,因车祸内脏破裂大出血,欲行急诊手术治疗。去手术室之前,护士遵医嘱为患者建立静脉通道并行输血治疗。因时间紧,护士从血库取血后将血袋放入热水中提温,5分钟后给患者输入。当输血10分钟后,患者感到头部胀痛,出现恶心、呕吐、腰背部剧痛。 发生此反应,护士首选的护理措施是()
A. 吸氧
B. 通知医生
C. 停止输血
D. 静脉注射碳酸氢钠
E. 送检剩余血,重做交叉配血试验
患者男性,49岁。特殊职业,在生产有机磷农药工作中违反操作规定,出现恶心、呕吐,多汗、流涎、瞳孔缩小,呼吸困难、大汗、肺水肿、惊厥等症状。全血胆碱酯酶活力降至30%以下,在治疗时使用阿托品静脉给药。 当出现阿托品中毒时可采取的治疗措施是
A. 减量观察
B. 密切观察
C. 对症处理
D. 应用解磷定
E. 应用毛果芸香碱进行拮抗