外单位承担或外来人员参与公司系统电气工作的工作人员应熟悉本规程、并经考试合格，经设备

人员进入机道内清煤时应采取那些预防措施？（）

A、采煤机、运输机停电闭锁

B、执行“敲帮问顶”

C、明确监护人

D、向矿调度室汇报

E、处理好隐患后再进行作业

牵引工况下，SKT手柄离开零位后，机车有一端电机出现电流冲顶的原因为（）。

A、电位器齿轮松动

B、某整流支路晶闸管击穿

C、主变次端同步移相异常

D、脉冲形成放大插件故障

离心泵密封填料漏失更换密封填料时，密封填料切口要错开（）角。

A、30°-45°

B、45°-60°

C、90°-180°

D、180°-270°

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。

     Most drinks stating that they are fruitflavored (水果味道的) contain no fruit at all, while most

of the rest contain only a small quantity of fruit, according to a study carried by the British Food

Commission.

     "Shoppers need to check the labels (标签) before buying drinks, though sometimes the actual

content can be nonexistent," said Food Commission spokesperson Ian Tokelove. "Food production

is highly competitive. __1__ It will increase profits, and consumers won't always realize they are

being tricked."

     Flavorings are focused on the flavors of natural food products such as fruits, meats and vegetables,

or creating flavor for food products that do not have the desired flavors. Researchers analyzed the

contents of 28 strawberryflavored products sold in stores.    __2__  Of the 11 products that did

contain strawberries, five of them contained less than one percent real fruit. In addition, each juice

box contained nearly eight teaspoons of sugar.

      __3__  Let's take jam as an example. Some strawberryflavored jam was labeled as containing

no artificial colors, flavors, or sweeteners, but it contained absolutely no strawberries at all.

     __4__  Consumers have the rights to know clearly about what they have bought. Under current

UK law, food packages do not have to distinguish between natural and artificial flavoring. "Describing

a product as strawberry flavor and covering the surface of the packet with pictures of strawberries is

misleading.   __5__ Unfortunately, it is also legal and widespread," Tokelove said. "It's time to take

measures to protect the consumers' rights."

A. The products which contain real fruit are popular with people.

B. Even products advertised as more natural often contained no fruit.

C. They found that about 60 percent of them didn't contain any fruit at all.

D. If companies can cut their costs by using flavoring, they are likely to do so.

E. It is important and necessary to demand a small amount of flavoring in the products.

F. Actually the product contains just a tiny percentage of strawberry or even no fruit at all.

G. The Food Commission suggested all flavors used in a product should be listed on the packaging.