我国夏季最高、最低气温不在最南端的曾母暗沙和最北端的漠河镇，而是分别位于吐鲁番盆

如某一种运输方式的优势领域是独具的，使该种运输供给无法替代，该运输方式就会在相应运输市场上取得()

A、一定协作

B、完全垄断

C、一定垄断

D、自由竞争

（共5小题；每小题2分，满分10分）

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。

The right pair of exercise shoes can do a lot to prevent discomfort and injuries, personal trainers say. Here are some shopping tips:

­   71   Depending on your workout, shoes designed for walking, running, tennis, cross-training or another specialty will provide the best support for your feet.

Shop when you normally exercise. Feet actually get bigger throughout the day, sometimes swelling up as much as a half-size by nighttime.    72  

Try them on. Never grab a pair of exercise shoes based only on the size of footwear you normally buy. Bring the type of socks you’d wear to work out and go for a walk through the store.

   73   You should be able to spread your toes out comfortably. Make sure there’s about a half-inch of space between them and the front of the shoe. The back should fit snugly (warmly and comfortably) against your heel and not move up and down. If your feet are different sizes, buy based on the larger one.

Talk to an expert. Shoe salesmen and personal trainers can study your stride (步伐) and the shape of your feet.   74  

   75   Many trainers recommend switching footwear every three to five months, if possible, to maintain proper cushioning and support.

One tip: if you have to tie your shoes very tightly to feel a good amount of support, they may be ready to go.

A．Think about how much you can afford to buy the workout shoes.

B．Consider your type of exercise.

C．Focus on fit.

D．So don’t shop first thing in the morning if you often work out in the evening.E. Pay more attention to new style shoes.

F. Replace worn shoes regularly.

G. Usually they can recommend the best shoes to guard against injuries.

鼻咽癌的病理类型多为_________，因此其治疗以_________首选。

支气管扩张症合并咯血时治疗一般不主张应用（）

A.抗生素

B.止血药

C.镇咳药

D.支气管扩张药

E.镇静药

在2SO₂+O₂2SO₃的反应里,开始SO₂和O₂的浓度均为0.5mol/L,2分钟后测得SO₂的浓度为0.25mol/L,则=_____________________，各物质所表示的反应速率的最简整数比::=_________