刮板输送机启动时,如果三次启动不起来,必须终止启动,查清原因,否则会造成设备故障。

题型:判断题

问题:

刮板输送机启动时,如果三次启动不起来,必须终止启动,查清原因,否则会造成设备故障。

考点:输送机司机考试输送机司机考试题库
题型:判断题
判断下列句子是否符合短文内容,符合的用“T”表示,不符合的用“F”表示。
         The elephant is another animal that lives in groups. An elephant herd (群) usually has from twenty to forty
members. The elephants in the herd depend on one another for help in time of trouble.
         The leader of the group is usually a wise and strong female. She
travels at the head of the herd and is followed by the other females and
their young. The bull elephants (公象)follow last. When danger threatens(威胁), the bulls form a circle around the weaker animals and guard (守卫)
them.
         The members of the herd are loyal to (忠诚) one another. A sick or
wounded elephant is not left behind to die. If an elephant is sick, the whole
herd stops traveling until it gets well. When an elephant is injured, two
others walk on both sides of it and support it with their bodies. A member
of the herd may be caught in a trap. Then the others try to free it.
         Elephants are fond of the youngsters in the group and give them special care. They help young animals
stay afloat (漂浮着) when the herd crosses a river. They work together to rescue a calf (幼象) that has
wandered (迷路) into a dangerous place.
        A female elephant that is about to give birth to (生产) her young leaves the herd for a short time. However,
she takes another female along to act as "aunt". The aunt stands guard and helps the mother with her new-born
calf. In this way, the whole herd protects its newest member.
( )1. The leader of the elephants travels in the middle of the herd.
( )2. In times of danger, the males form a circle around the weaker animals.
( )3. The leader of an elephant herd is usually a strong female.
( )4. Sick elephants are usually left behind to die.
( )5. Elephants will try their best to save the young ones when they are in dangerous situations.
( )6. Elephants can help each other in time of trouble.
( )7. A strong elephant can carry a sick elephant on its back.
题型:判断题

在一条件下,可逆反应2A(g)+B(g)⇌nC(s)+D(g)达平衡.若维持温度不变,增大压强,测得混合气体的平均相对分子质量不变,则下列判断正确的是(  )

A.其它条件不变,增大压强,平衡不发生移动

B.其它条件不变,增大压强,混合气体的总质量不变

C.该反应式中n值一定为2

D.若原混合气中A与B的物质的量之比为2:1,则 

2M(A)+M(B)
3=M(D)

题型:判断题

有关南极洲气温低的原因的叙述,错误是[ ]

A.是地球上纬度最高的洲    

B.是地球上平均海拔最高的洲    

C.周围被太平洋、大西洋、印度洋环抱    

D.冰雪覆盖,对太阳光有较强的反射率,吸收太阳辐射较少

题型:判断题

基坑边坡失稳的实质是边坡土体中的剪应力大于土体的抗剪强度。土体的抗剪强度来源于土体的内摩擦力和( )。

A.内聚力
B.静水压力
C.湿化程度
D.附加荷载

题型:判断题

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