The citing of dangerous effects of pesticides on laboratory animals in paragraph 3 is used
A. scientists are also concerned with the effects of pesticides on animals
B. cancer is the worst effect of the pesticides
C. most or all of the dangerous effects of pesticides are now known
D. the chemicals may also cause these effects in humans
查看答案
内部收益率(IRR-InternalRateofReturn)是使投资项目净现值为零的折现率。()
It is indicated in Paragraph 1 that______.
A. seeing is not always believing
B. healthy people also should always go to hospital for a cancer screening
C. through our own physiological system can we eradicate tumors
D. screening for lung cancer, to some extent, may do more harm than good
销售部门应当设置销售台账，及时反映各种商品、劳务等销售的开单、发货、收款情况，并由相关人员对销售合同协议执行情况进行定期跟踪审阅。销售台账应当附有客户订单、销售合同协议、客户签收回执等相关购货单据。()
In paragraph 2, the author states that few have personal memories of the 1929 crash before
A. testify to the memory of investors
B. show that investors act the same way throughout time periods
C. stress the lasting impact of the crash
D. criticize the present attitude of investors
微信支付 
支付宝支付