Uncle jack is

When is the deadline of the application for the next semester？

A．It is two months from the end of this semester.

B．It can"t be later than two months before the semester begins.

C．It is at the beginning of the second month of the next semester.

D．It is at the end of the second month of this semester.

请帮忙给出正确答案和分析，谢谢！

关于氯丙嗪的作用原理哪一项是错误的？

A、阴断D1受体

B、阻断D2受体

C、阻断α受体

D、阻断β受体

E、阻断M受体

请帮忙给出正确答案和分析，谢谢！

According to the news item, what make(s)the major bush fire spread？

A．Two large fires that were joined up into a big one.

B．High temperatures and more powerful winds.

C．The burning in key areas that was out of control.

D．Exhausted firefighters not ready for their most challenging day.

请帮忙给出正确答案和分析，谢谢！

可结合抗原的是

A.KIR2DL

B.NKp46

C.TCR

D.MBL

E.CEA

请帮忙给出正确答案和分析，谢谢！

钙的最好的食物来源是

A.豆类

B.蔬菜水果类

C.奶类

D.谷类食物

E.精制糖

请帮忙给出正确答案和分析，谢谢！