以下说法中不符合实际的是( )
A:某初中生的质量约为50kg
B:人体正常体温约为42℃
C:学生书桌高约为200cm
D:人正常步行速度约为5m/s
青藏地区河谷地带种植的主要农作物是( )
0.12.+0.23.+0.34.+0.56.+0.67.+0.78.+0.89.=____ .
给下列句子选择合适的答语。
① How do you like this chess? ____ A. It's$50.
② How much is this sweater?____ B. Yes How much is it?
③ The socks are $50. ____ C. It's very pretty.
④ Can l help you? ____ D. They're too expensive.
如图1所示,用A、B两把刻度尺测量同一物体长度,放置正确的是____刻度尺,其分度值是____,该物体的长度为____cm.图2秒表的读数为____s.
There are lots of books in the library.(改为同义句)
____