钻石晶体结构中化学键类型是()。
A.分子键
B.离子键
C.共价键
D.金属键
参考答案:C
某人得了肺结核病,对健康子女有影响,是因为这种病 [ ]
A.是可遗传的
B.是可变异的
C.是可传染的
D.不能医治的
You say you don’t believe in marriage,but I bet you sing a different song when you finally ______ with this beautiful girl.
A.fall in love
B.get along
C.are connected
D.are pleased