用一根长（ ）厘米的铁丝正好围成长6厘米、宽5厘米、高2厘米的长方体框架。 A．

血清学检测使用 （）

A.紫头管

B.红头管

C.淡蓝头管

D.灰头管

E.绿头管

镁和铝分别与等浓度、等体积的过量稀硫酸反应，产生气体的体积（V）与时间（t）关系如右图。反应中镁和铝的                                   （   ）

A．摩尔质量之比为2:3

B．物质的量之比为3:2

C．质量之比为3:2

D．反应速率之比为2:3

Five Ways to Rock the Rest of the Semester

With exams around the corner, how can you possibly pack in one more English word, let alone the causes of the Cold War? Don’t worry. Here is our handy guide to help you

Power Down

So you stayed up too late last night reading Mockingjay for the fifth time. Oops! When you’re that fired, your schoolwork suffers. Instead of studying inefficiently while you are sleepy, allow yourself a 15-minute afterschool power nap. Studies show that even a few minutes of shut-eye can improve memory and concentration.

Take Notes

Not quite grasping that super complicated concept in your chemistry class? You may need to change the way you take notes. Instead of recording every word your teacher says, try using visual hints like pictures, symbols and word bubbles. You can even switch computer fonts or pen color for the important stuff.

Dream On

Your bed’s not just for zzz’s. Experts say it may be good to study in bed, too. Why? We’re able to absorb more right before bed because we’re less distracted and the new information stays in our minds as we sleep. So, slide into bed with a textbook or notes, read for 15 minutes, and then turn off the lights for some sweet and smart dreams.

Brain Food

You’re in the middle of a biology exam when your mind goes blank. You knew this stuff cold at home, but now you can’t tell a ribosome from a chloroplast. What’s going on? Your brain’s in need of some refueling. Have some snacks like apple slices or cheese before class, and have plenty of water, too. If your teacher doesn’t mind, pop in a piece of gum during an exam. Some scientists think the chewing increases the flow of oxygen to the brain.

Smart Move

Ugh! You’re taking an English test and you cannot remember the past participle of “understand”. What to do? Skip it. Test taking is all about timing, so don’t waste it on tricky questions. Move ahead and answer everything you know before returning to the ones you don’t. Chances are, once you get back to the toughies, you’ll recall the answer or at the very least, you’ll have a little more time to come up with one that works.

小题1:When taking notes, we can do all these except ______.

A．draw pictures

B．change the typeface

C．switch on the computer

D．colour the key points小题2:According to the passage, _____.

A．it’s good to study under the covers for some time every day

B．you cannot skip the difficult questions and go on to the rest

C．you can have some snacks and drink enough water to refresh yourself in exams

D．when taking notes, you should record whatever the teacher says小题3:What does the underlined phrase “knew this stuff cold” mean?

A．had no clue about it

B．were a cold fish

C．knew it was cold

D．were familiar with小题4:You have been working on your essay for two hours and your eyes feel tired, you’d better

A．Power down

B．dream on

C．eat brain food

D．make a smart move

患者，女，40岁，上腹部节律性疼痛3年。现症见胃脘隐痛，有时灼痛，午后尤甚，嘈杂似饥，口燥咽干，心中烦热，消瘦，大便干结，舌红，苔黄少津，脉细数。检查：胃镜示胃溃疡，胃液分析示胃酸分泌正常。其治法是（）

A．疏肝理气，和胃止痛

B．养阴益胃，和胃生津

C．健脾益气，温中和胃

D．活血化瘀，和胃止痛

E．疏肝泄热，和胃止痛