5岁患儿突发寒战高热，左大腿下端深压痛，患肢不敢活动，白细胞总数升高。应首先考虑的诊

如图所示，一正电荷在电场中受电场力作用沿一圆弧ab运动，已知电荷的电量为q，质量为m（重力不计），ab弧长为s，电荷在a、b两点时的速度大小均为v，且它们方向间的夹角为θ，则（　　）

A．该电场的场强方向指向弧ab的圆心

B．a、b两点的场强大小等于mv²θ/sq

C．a、b两点的电势相等

D．电荷在a点受到的电场力与在b点所受的电场力相同

Do you still get free plastic bags（塑料袋） from the supermarket（超市）? Things will change soon.

To protect(保护) the environment, supermarkets in China will stop providing (提供) free plastic bags after June 1st. If you don't want to pay money to buy them, you'll have to bring your own shopping bag.

What kind of bags will be the best to bring? Students in Kunming Xinying Middle School have some good ideas.

Recently 54 students of the school held an activity in which they made their own environmentally-friendly shopping bags.

Most students used old clothes to make their bags. They painted pictures like the Olympic rings on them.

But Wang Shuncheng, a Junior 2 boy, chose a different material (材料). He made his bag with old newspaper. Is a newspaper bag strong enough to hold shopping? Wang says it is, "No problem. I put six bottles of water in the bag," he said. "It's strong enough!"

Chen Lisi, a girl, had a more traditional way to make her bag – she weaved (编织) a bamboo basket. It was not an easy job. With her grandfather's help, Chen spent a whole afternoon making it. She also weaved wool (毛线) flowers on the basket.

Making bags was not all the students did. They had another job: to persuade their parents and relatives to use environmentally-friendly shopping bags instead of plastic ones. The school will show the bags so that shops and stores can get inspiration (灵感) from the students' work.

小题1:On June 2nd, if you don’t bring a shopping bag, ________ in the market.

A．you can get free plastic bags

B．you’ll have to pay for the plastic bags

C．you can’t buy anything

D．you can’t use plastic bags小题2:From the passage, we can infer(推测) that ___________.

A．Plastic bags will not come into our life any more.

B．When you go shopping after June 2nd, you have to bring a shopping bag.

C．Plastic bags are bad for the environment.

D．No one will use plastic bags after June 2nd.小题3:What does “persuade” in the last paragraph mean?

A．劝说

B．阻止

C．保证

D．反对小题4:Supermarkets in China stop providing plastic bags because _________.

A．they want to save money

B．markets want to make more money

C．plastic bags are very expensive

D．they want to protect the environment小题5:Which of the following is not right from the passage?

A．People may use other material to make shopping bags.

B．The students’ work may bring inspiration to the supermarkets.

C．You can’t use plastic bags in supermarkets any more after June 1st.

D．The newspaper bag made by Wang Shuncheng seems strong.

某水闸启闭机房钢筋混凝土悬臂梁跨度为1.8m，其底模拆除时，混凝土的强度至少应达到设计强度等级的（）。

A.50% 

B.70% 

C.80% 

D.90%

一旦商业银行采用了()，未经监管当局批准不可退回使用相对简单的方法。

A.标准法

B.基本指标法

C.高级计量法

D.流程分析法

有关乳腺恶性肿瘤的说法中，哪项不正确（）

A.肿块边缘模糊

B.界限不清

C.有长或短毛刺

D.肿块密度较低

E.出诊肿块的大小常大于X线片所见