皮皮学,免费搜题
登录
搜题
【单选题】
汽车、拖拉机齿轮要求表面高耐磨性,心部有良好的强韧性,用:
A.
20CrMnTi钢渗碳淬火+低温回火
B.
40Cr钢淬火+高温回火
C.
55钢渗碳+淬火
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】Christianity has become a worldwide religion since it()almost two thousand years ago.
A.
has begun
B.
had begun
C.
began
D.
begins
【单选题】Since the Iraq war, many an American has come to realize that it is almost impossible for him or her to strike it rich no matter how hard he or she works.
A.
Y
B.
N
C.
NG
【简答题】阅读理解。 Danny was just tired about the way things were going. His mum came to school and talked on and on about Rick Jackson. It seemed that she would never stop talking. 'Somebody's got to stop that bo...
【判断题】山西古建筑遗存极为丰富,其中仅古戏台尚遗存了2000多座。其中年代最久远的是一座金大定二十三年(1183)遗留的金代戏台。这座戏台是高平二郎庙戏台
A.
正确
B.
错误
【单选题】【C2】
A.
for
B.
at
C.
in
D.
since
【单选题】Since 1999, the number of foreign students at German universities ______ from 113,000 to almost 200,000. [     ]
A.
has increased
B.
have increased
C.
are increased
D.
was increased
【单选题】He will get everything ready ______ three days.
A.
after
B.
for
C.
in
D.
since
【单选题】My uncle went to Australia last year. We haven't seen him ______. [     ]
A.
since almost a year
B.
from almost a year on
C.
after almost a year
D.
since almost a year ago
【单选题】Almost since the beginning of mankind, governments have been recording the numbers of their populace. The first known census report took place in 3800 B. C. in Babylonia for the purpose of deciding wh...
A.
1085
B.
1200 B.C.
C.
3800 B.C.
D.
1790
【单选题】Since then the population of London________by almost 50,000 a year—an increase largely fuelled by immigration.
A.
has risen
B.
have risen
C.
rises
D.
rise
相关题目: