小麦收获适期为蜡熟期。
参考答案:错
—I don't know how to pronounce this word. Can you help me?
—Sorry, I don't know, either. Let's _____ in my dictionary right now. [ ]
A. look it up
B. look up it
C. look them up
D. look up them
1岁以内小儿心力衰竭最常见的原因是
A.先天性心脏病
B.心律失常
C.心肌炎
D.心内膜弹力纤维增生症
E.缺血性心脏病