施工中,石墙要分层砌筑,每层高( )mm。
A.100~200 B.200~300C.300~400 D.400~500
参考答案:C
---- Did you visit the Big Ben in London?
---- No, we ______ it, but we spent too much time shopping.
A.could visit
B.could have visited
C.must ahave visited it
D.can have visited
舌前2/3的一般感觉神经为
A.参与舌神经的鼓索纤维
B.舌咽神经
C.舌神经
D.舌下神经
E.舌前神经