按照我国有关规定,柴油机的气缸编号采用动力端排起。
参考答案:错
解析:按照我国有关规定,柴油机的气缸编号采用自由端排起。
与胃癌不相关的肿瘤标志物为()
A.CA242
B.CEA
C.CA19-9
D.CA50
E.PSA
用所给词的适当形式填空。
1. What's your ________ (high)?
2. The boys often go ________ (swim) in that river in summer.
3. Nobody ________ (like) his new look.
4. Many young people want to be ________ (sing).
5. He wears ________ (glass) every day. He thinks that's very cool.