量油尺铊接近罐底20厘米时应放慢速度,以防()冲击罐底.
参考答案:铊尺
By the time he was dying, he made a testament that he would______his kidney(肾) to those who were in need of it.
A.contribute
B.donate
C.provide
D.introduce
在社会主义建设的新时期,中 * * 党解决“三农”问题的典型事例是[ ]
A.进行土地改革
B.开展农业合作化运动
C.实行家庭联产承包责任制
D.实行政企分开