利用PubMed的基本检索查找有关hypertension近3年的文献，正确的检索式是（） A: hypertension AND “last 3 year”[dp] B: hypertension AND “last 3 year”[ti] C: hypertension AND “last 3year”[au] D: hypertension AND “last 3 year”[pt]

下列变量定义形式正确的是？ A: int age,year,float, salary; B: int myAge,year;float salary; C: int _age,3year;float my_salary; D: int age;int return;float salary;

在下面函数中，返回年份的表达式是（ ）。 A: year（5/3/2010） B: year（“5/3/2010”） C: year（%5/3/2010%） D: year（ E: 5/3/2010 F: ）

What is the payback if the initial investment is $60,000 and the cash flows are? ( )Year 1$20,000Year 2$25,000Year 3$30,000Year 4$10,000Year 5$5,000 A: 1.75 years B: 2.25 years C: 2.50 years D: 2.45 years

How often were meetings held on the subject of the ICC（） A: the second and third month of each year B: 2 to 3 times every year C: 2 to 3 times a month D: every 2 or 3 years

People with poor best corrected visual acuity should be reviewed ( ) A: Half a month B: 1~3 months C: Half a year D: 1 year

The number of students participating in online courses varies 　. A: year to year B: year and year C: year by year D: year on year

This year is the year of Gengzi, and next year is the year of ___________.

Your management is evaluating a project which requires an investment of $500,000. The expected inflow is $100,000 for 1st year, and $300,000 for every year after that. What is the payback period A: 2 year B: 2 years and 4 month C: 3 year D: Cannot be determined because discount rate is not specifie

Persephone had to live ___________ of a year in the Underground. A: 1/3 B: 1/2 C: 2/3 D: 1/4