如图所示,放在水平地面上的物体M上放着物体m,现两者之间有一处于压缩状态的弹簧,

题型:选择题

问题:

如图所示,放在水平地面上的物体M上放着物体m,现两者之间有一处于压缩状态的弹簧,整个装置一起向左运动.则M、m的受力情况是(  )

A.m受到向右的摩擦力

B.M可能受到m对它向左的摩擦力

C.地面对M的摩擦力向右

D.地面对M的摩擦力向左

考点:弹力的大小、胡克定律滑动摩擦力、动摩擦因数力的合成
题型:选择题
已知平面向量
a
=(0,1)
b
=(x,y)
,若
a
b
,则实数y=______.
题型:选择题

在地球仪上,纬线指示[ ]

A.东西方向

B.东北—西南方向

C.南北方向

D.西北—东南方向

题型:选择题

关于县域建筑业信贷产品,下列说法正确的是()。

A.对建筑企业、建设单位均在农业银行就同一项目办理贷款的,二者的贷款总余额不超过项目总投资的50%

B.借款人在农业银行短期信用余额不超过同期企业承建工程合同总金额的20%

C.县域建筑业信贷产品需要对建筑业贷款实行专户管理

D.流动资金贷款按使用方式可分为一般流动资金贷款和可透支流动资金贷款

题型:选择题

如果进出境运输工具从一个设立海关的地点驶往另一个设立海关的地点装卸货物,未经海关批准又尚未办结海关手续的情况下,海关可对其处以( )。

A.10万元以下的罚款

B.9万元以下的罚款

C.7万元以下的罚款

D.2万元以下的罚款

题型:选择题

Jenny Gonzalez is excited to go to school these days. The 13-year-old from South Gate Middle School in Los Angeles, US, is taking care of three green abalones(鲍鱼)at school.

The students of Violeta Llamas’ science class, including Jenny, have cared  for the sea animals since January. The class formed eight t 小题1: .Each team takes turns to care for the abalones.Team five—Jenny, Alexis Diaz, Jennifer Gonzalez and Ricardo Beltran—have now got their t 小题2:

The abalones are k 小题3: in a box of seawater. Every day Alexis, 12, checks if the water has too much salt.Too much salt is b 小题4:  for the health of abalones.Jenny makes fresh saltwater.

Then the four students work together to clean u小题5: the waste in the box and feed the abalones.

“Sea life is l小题6: a baby. You have to clean them and care for them. ”Jennifer said.

Nancy Caruso, a scientist, leads the project. She said the number of green abalones along the state’s coast is going down because people have c 小题7: too many of them.She said p 小题8: the sea is now the duty of the next generation(一代人)—young students.

“The students love taking care of the abalones.” said Llamas.

“This could open the door for those who want to be a sea life scientist o 小题9: an environment protector” she said.

The s小题10: time with the abalones will end this school year. Caruso and a team of volunteers will record the abalones and then send them into the sea.

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