* * 狭窄的主要临床表现不包括().
A.排尿困难
B.尿线变细
C.血尿
D.夜尿
E.尿痛
参考答案:E
Daniel is a good student. He ____ Chinese and Maths.
A.is good with
B.is from
C.is good at
D.is like
下列晶体中既有离子键又有非极性键的是( )
A.NaOH
B.Na2O2
C.CaCl2
D.H2O2