微生物命名的一般形式是（）
A.科+种
B.属+亚种
C.属+种
D.种+亚型
参考答案：C
I _______ some clothes to charity because they were too small for me. [ ]
A. handed out
B. gave away
C. ran out of
浓缩塔塔顶回流阀是（）调节阀位。
A.自动
B.手动
C.比例
D.积分
