blocks have been overhauled
hauling parts of two tackles are attached
hauling part leads through the movable block
hauling part leads through the standing block
第1题：
An advantage of DC motors over AC motors is that they______.
A.are less expensive
B.require less maintenance
C.can be started across the line
D.offer a more effective means of controlling speed
第2题：
A block and tackle is rove to advantage．This means that the ______．
A.blocks have been overhauled
B.hauling parts of two tackles are attached
C.hauling part leads through the movable block
D.hauling part leads through the standing block
第3题：
A、assistance
B、assistant
C、associate
D、assit
第4题：
Since the freight payments are taken care of by the freight forwarder， the carrier doesn′t have to take any （）.
第5题：
单样本t检验应当选择的操作菜单是（）
第6题：
A tackle is "two blocked" when the blocks are ______.
A.equally sharing the load
B.jammed together
C.as far apart as possible
D.rove to the highest mechanical advantage
第7题：
多因素方差分析应选择的操作菜单是（）
第8题：
The trend nowadays is to build the frame box as a separate fabricated construction and then, after stress relieving and machining the mating surfaces, to mount it on the _____. This has the advantage of saving weight.
A.seating
B.bed-plate
C.entablature
D.cylinder block
第9题：
Which of the following is not an advantage of block media recovery （BMR）？（）
第10题：
something very sharp
the outside limit or boundary
the degree of anger, nervousness or annoyance
a slight advantage over somebody