地球自转的方向是______，自转一周的时间大约是______小时，也就是___

如图所示，一光滑平行金属轨道平面与水平面成θ角。两轨道上端用一电阻R相连，该装置处于匀强磁场中，磁场方向垂直轨道平面向上。质量为m的金属杆ab，以初速度v₀从轨道底端向上滑行，滑行到某以高度h后又返回到底端。若运动过程中，金属杆始终保持与导轨垂直且接触良好，且轨道与金属杆的电阻均忽略不计，则（  ）

A．整个过程中金属杆所受合外力的冲量大小为2mv₀

B．上滑到最高点的过程中克服安培力与重力所做功之和等于

C．上滑到最高点的过程中电阻R上产生的焦耳热等于

D．金属杆两次通过斜面上的同一位置时电阻R的热功率相同

对创新进行战略考量，首先要从不同的角度理解创新的（），有针对性地思考战略方向。

A.战略

B.层面

C.数量

D.类型

上海证券交易所规定，采用竞价交易方式的，每个交易日的______为开盘集合竞价时间。

A．9:10～9:20
B．9:10-9:25
C．9:15～9:25
D．9:15～9:20

(1) The word "addiction" usually makes you think of alcohol or drugs, but in modern-day society we are seeing some new kinds of addictions. Some people are compulsive (难以自制的) shoppers. Others find it impossible to pull themselves away from their work. Still others spend countless hours watching TV or playing computer games.
(2) Over the years, shopping has become a very common activity. Many people enjoy going to stores more and more every day, but it’s more than a common hobby for some of them. They have turned into shopaholics. They are people who simple enjoy shopping and walking around spending money without being able to stop doing it. They are hooked on shopping and usually buy things that they don’t need. Even though they don’t have enough money, they buy everything they want.
(3) The question is, why do they have this addiction There isn’t a specific answer. Some people go shopping when they are sad, worried, upset or lonely, and they want to feel better. They use this activity as a way to forget their problems. Shopaholics say that they feel more important and better after they buy something. They also tend to have this addiction when they feel guilty.
(4) Shopaholism seems to be a harmless addiction, but it can ______. Some of them can be psychological. If this is the case, people addicted to shopping should go to a support group to help them break this habit. However, the process, like for most addictions, is long, and they suffer a lot. It can also cause financial problems. They just think about satisfying their feelings, so they spend money they don’t have. They get deep in debt, and they can even go bankrupt and get sent to prison.

Which sentence in the text is the closest in meaning to the following one
Accordingly, these shopaholics should turn to a certain organization for help so that they can stop compulsive shopping.

地下室侧墙外抹水泥砂浆找平层，并在找平层上涂刷两道热沥青或防水涂料。在基坑回填土时，靠近墙体（）选用回填土为粘土、灰土等弱透水性的土，减少水分在侧墙外蓄集。

A、500MM

B、400MM

C、600MM

D、450MM