基因诊断及治疗的伦理原则应除外()
A.尊重病人的原则
B.知情同意的原则
C.有益于病人的原则
D.保守秘密的原则
E.创新至上的原则
参考答案:E
When Peter speaks in public, he always has difficulty ______ the right things to say.
A.thinking of
B.to think of
C.thought of
D.think of
螺纹装配包括()装配。
A.普通螺纹
B.特殊螺纹
C.双头螺栓
D.双头螺栓和螺母螺钉