我国机动车辆保险规定,保险人不予承保的车辆有()行驶证和号牌
A.电瓶车
B.电动自行车
C.拖拉机
D.冷藏车
参考答案:B
The most of his time is ____ to prepare for the college entrance examination.
A.used
B.spent
C.taken
D.made
压力式温度计的测温原理是什么?