正常前列腺液的pH为()
A.4.5~5.2
B.5.4~6.2
C.6.3~6.5
D.6.6~7.0
E.7.2~7.8
参考答案:C
莫霍面上下两侧名称分别是( )
A.地幔和地壳
B.岩石圈和地壳
C.地幔和地核
D.地壳和地幔
I'm hungry. Please give me something . [ ]
A. eat
B. to eat
C. eating
D. to drink