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【单选题】
关于羊膜,下列哪项描述是正确的A.
是胎盘的最内层，构成胎盘的母体部分
B.
为半透明薄膜
C.
母体面光滑
D.
胎儿面粗糙
E.
正常厚0.O5mm
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举一反三
【单选题】— Excuse me, can you tell me the way to the zoo? — Sorry, I'm new here. Please ask that policeman. He _____ know. [ ]
A.
can
B.
need
C.
may
【单选题】—Excuse me, could you tell me _______? —There is a bank on the second floor. You can make it there
A.
how I can get to the bank
B.
where I can exchange money
C.
if there’s a bank near here
D.
where the bank is
【单选题】Excuse me, could you tell me________?
A.
where can I have my MP4 repaired
B.
what was happened to you
C.
how could I go to the e-shop
D.
what is wrong with your bike
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