曲轴安装硅油减振器的目的是为了防止发生()共振。
A、往复
B、扭转
C、径向
D、轴向
参考答案:B
下列不属于遗传现象的是[ ]
A.母牛产下小牛
B.马与驴生下后代骡
C.种瓜得瓜
D.一对双眼皮夫妇生下双眼皮小孩
根据句意及首字母或者汉语提示填空,完成句子。
1. I don't like _______(沙拉) at all.
2. Jones is a _______(赛跑) star, and she is very active and strong.
3. We should eat _______(健康的) food so that we can be strong.
4. B_______ is very important in a day.
5. Do you like eating h_______?