The characteristics of Longwall Shield?
A: more powerful and faster/cutting speeds exceeding 100 fpm
B: shield movement can be a significant source of dust
C: coal and/or rock fall from the top of the shield canopy directly into the airstream
D: requires shields to advance at a faster rate
A: more powerful and faster/cutting speeds exceeding 100 fpm
B: shield movement can be a significant source of dust
C: coal and/or rock fall from the top of the shield canopy directly into the airstream
D: requires shields to advance at a faster rate
A,B,C,D
举一反三
- The phrase “face shield” can be translated into .
- 2.It is the duty of servicemen to shield their country from invasion.
- shield
- 中国大学MOOC: The phrase “face shield” can be translated into .
- Living constantly in the atmosphere of slave, he became infected ______ the unconscious ______ their psychology. No one can shield himself ______ such an influence. A: on B: by C: from D: through
内容
- 0
It is the duty of servicemen to shield their country from invasion. （ ） A: 使……免受 B: 躲避 C: 遮盖 D: 逃走
- 1
The phrase “face shield” can be translated into( ). A: 无线电接收器 B: 盾牌 C: 面罩 D: 工字梁
- 2
Which are the impacts of higher tax rates on net present value？ A: The tax shield effect of depreciation increase B: The tax shield effect of depreciation decrease C: the income tax increase D: the income tax decrease
- 3
Multimodal transport has the following characteristics( ). A: involving more than one mode of transport B: providing faster transit of goods C: saving costs D: cutting down the costs of exports
- 4
Betty loves reading. ________, "Reading is the most wonderful thing in the world." A: In her words B: Relate to C: Shield from D: Sum up