铁剂适用于( ) A．缺铁性贫血 B．再生障碍性贫血 C．巨幼细胞贫血 D．特发性血

给下面加粗的字注音。

附和（    ） 　砚台（    ）   羼水（    ）　涨红（    ）    绽出（    ）    

哄笑（    ）　间或（    ）    着了慌（    ）    打折腿（    ）　不屑置辩（    ）

Only after food has been dried, salted or canned ______ for later consumption.

A．that is should be stored

B．should be stored

C．should it be stored

D．it should be stored

均方根值是（）

A.NEQ

B.DQE

C.RMS

D.ROC

E.SNR

根据句意用适当的人称代词填空。

1. This is Linda. _____ is my friend.

2. This is my daughter. _____ is ten

3. —What's this?

    —_____ is a pen.

4. This is John. _____is my brother.

5. —Are those your friends?

    —Yes, _____ are.

6. —Are _____eleven years old?

    —No, I'm ten.

7. —Are you and Tom good friends?

   —Yes, _____ are.

绒毛膜和母亲的子宫壁共同形成（）。

A、胚盘

B、胎盘

C、胎座

D、胎儿