Which of the following would the author probably agree with
A. The environment crisis will not be solved unless we stop using virgin materials.
B. In scientific research, a higher priority should be given to understanding all living systems.
C. Exploration of outer space will finally lead to an improvement on human living conditions.
D. S. high-technology companies are applauding this new twist in scientific research.
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甲上市公司2007年10月1日开始为某企业提供大型机械安装业务，安装期为10个月，合同总收入1000万元，至年底已预收款项400万元，实际发生成本300万元，估计至安装结束尚需发生成本500万元。在剩余的合同价款韶可靠收回的情况下，甲上市公司2007年度该项安装业务应确认的劳务收入为( )万元。
A. 300
B. 375
C. 400
D. 500
筛选是根据药物与杂质的哪点不同来分离药物中的杂质( )
A. 比重
B. 体积
C. 浮力
D. 色泽
E. 气味
Which of the following statements is True
A. The problem of the health care for Americans is no longer a national concern.
B. Doctors in America don't care much about the future of the health care system.
C. Addressing the challenges will undermine the system of private care in America.
D. Improvement of the health security system ill America is a very delicate problem to handle.
During Prohibition, illegal alcohol was ______.
A. sold openly
B. no longer a temptation
C. a major factor in the passage of the Volstead Act
D. brought across the Mexican and Canadian borders
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