使用设备的环境温度为
A.0~2℃
B.3~4℃
C.36~40℃
D.5~35℃
E.40℃以上
参考答案:D
解析:使用时应注意设备的环境温度为5~35℃。
Is there any chance of Tom ______ the farm instead of his elder brother? He’s interested in it actually.
A.to run
B.ran
C.runs
D.running
已知a+b=2,则a2-b2+4b的值为______.