如图所示，两物体放在光滑的水平面上，中间用轻弹簧相连．从左边水平拉动M，使它们产

发布时间：2017-06-20 13:06 │ 来源：www.tikuol.com

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问题：

如图所示，两物体放在光滑的水平面上，中间用轻弹簧相连．从左边水平拉动M，使它们产生一个共同的加速度a，这时弹簧的伸长量为L₁；从右边水平拉动m，使它们也产生一个共同的加速度a，这时弹簧的伸长量为L₂．已知两物体的质量为M＞m，则关于L₁和L₂的大小关系为（　　）

A．L₁＞L₂

B．L₁=L₂

C．L₁＜L₂

D．无法确定

考点：弹力的大小、胡克定律牛顿第二定律

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理论上说，市盈率越高的股票，买进后股价下跌的可能性（）。

A、越大

B、越小

C、不变

D、两者无关

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调查投标环境的重点包括（）。

A．施工现场条件

B．经济条件

C．材料、设备供应条件

D．专业分包的能力和分包条件

E．工程现场附近各种社会服务设施和条件

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激励理论大致可以分为几种基本类型，即( )

A．内容型激励理论

B．过程型激励理论

C．状态型激励理论

D．自我感知型激励理论

E．综合型激励理论

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题型：选择题

阅读理解。
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两
项为多余选项。

     Shoppers who carefully plan their visit to the grocery store can save money on their grocery bills.   1
Shoppers should visit the grocery store on a full stomach by scheduling their trip immediately after a large meal. If that's not possible, they should find something healthy to eat while preparing a grocery list.   2
     Although having a list and sticking to it is the most important  factor  in  saving  money, shoppers  must prepare lists wisely in order to save.    3   Many special buys are announced through the local newspapers, so buying the "grocery issue" is worth the investment (投资). However, it's important to remember that
many newer, more expensive products first offered through coupons may not yield enough savings for
shoppers to give up the product they usually buy.
         4   Once at the store, the shopper who wants to save money  should  follow  a  few  more  rules.
The shopper should not stay longer than necessary, because bills go up each minute the shopper is in the
store. So, setting a time limit and a cost limit can hold down the bill.
       5    If the grocery list is a short one, some shoppers choose to use the small handheld basket instead
of the roomy grocery cart.

A. A carefully planned list should include in season    produce and any items on sale or discounted
    through  coupons (优惠券).
B. Of course, the shopper should stick strictly to the    shopping list and resist the temptation to buy
     additional items.
C. People who are full are less tired and more likely to    buy what they want.
D. Now that the shopper has completed the grocery list,it's time to leave for the store.
E. You should keep your shopping list carefully in case     you can exchange it for coupons.
F. Most shoppers are less persuaded to buy extra goods     when they are not hungry.
G. Shopping when not hungry, sticking to a grocery list,and following a few simple rules will cut down
     the    grocery bill.

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题型：选择题

简述哲学家治国的思想。

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