结核菌素试验阳性表示()
A．患有结核病
B．具有传染性
C．对结核菌敏感
D．曾受过结核菌感染
E．免疫力强
参考答案：D
Kunar can take his car apart and put it back together again. I certainly wish he_____ me how.
A．teaches
B．will teach
C．has taught
D．would teach
常温下，将0.1mol-L-1氢氧化钠溶液与0.06mol-L-1硫酸溶液等体积混合，该混合溶液的pH等于（ ）
A．1.7
B．2.0
C．12.0
D．12.4
