【单选题】It is______for the interviewee to work until midnight now.
【单选题】It is thus of exceptional importance ______ extinction theories, but until now problems with dating have limited its potential.
A.
for a testing purpose on
B.
as a testing reason in
C.
as a testing ground for
D.
for some useful ends of
【判断题】根据儿童生理特点,儿童期适宜的音域为c1-d2。
【单选题】NPN型三极管放大电路中,若三极管的基极与发射极短路,则下列说法正确的是()
【单选题】“深海勇士号”在南海下潜作业28次、388项测试任务和52小时连续下潜4次的记录。同时,中国万米级载人潜水器的研制正________地进行着,预计将在2020年完成研制。 3.文中画横线的句子有语病,下列修改最恰当的一项是 A. “深海勇士号”在南海创造下潜作业28次、388项测试任务和52小时连续下潜4次的记录。 B. “深海勇士号”在南海下潜作业28次,完成了388项测试任务和52小时连续下潜...