单项选择题

Little（）what others think.

A．does he care about
B．did he care about
C．he cares about
D．he cared about

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单项选择题

（）more careful，his ship would not have sunk.

A．If the captain were
B．Had the captain been
C．Should the captain be
D．If the captain would have been

称取“0.1g”指称量重量可为0.06~0.14g，称取“2g”指称取重量可为（），称取“2.0g”指称取重量可为1.95~2.05g，称取“2.00g”指称取重量可为（）。

答案： 1.5~2.5g;1.995~2.005g