肾糖阈的正常数值为
A.180~200 mg%
B.100~140 mg%
C.160~180 mg%
D.100~120 mg%
E.140~180 rog%
参考答案:C
I'd like a job which pays more, but_________ I enjoy the work I'm doing at the moment.
A.on the other hand
B.on the contrary
C.instead
D.as a consequence
下列过程中,物体的重力势能转化为动能的是 [ ]
A.跳伞运动员在空中匀速下落的过程
B.热气球上升的过程
C.汽车在水平路面上匀速行驶的过程
D.铅球自由下落的过程