PLC程序中的END指令的用途是（）。A、程序结束，停止运行 B、指令扫描到端点，有

下列项目中，属于劳务报酬所得的是( )。

A．个人为他人提供担保获得的报酬
B．提供专利权而取得的报酬
C．作家将文字作品手稿原件拍卖所得
D．高校教授受出版社委托进行审稿取得的报酬

阅读理解。

     A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin cancer,

actually increases the risk.

     Researchers from the University of lows based their findings on a review of 18 earlier studies that looked

at the association between sunscreen use and melanoma (黑素瘤). They said that they found flaws in studies

that had reported associations between sunscreen use and higher risk of melanoma.

     Most health experts believe that by protecting the skin from the harmful effects of the sun, sunscreen

helps prevent skin cancer, which is increasing in incidence (发生率) faster than any other cancer in the

United States.

     But questions have been raised about sunscreen and whether it may have the opposite effect, perhaps

by allowing people to remain exposed to the sun longer without burning.

     The researchers said that among the problems with some earlier studies is that they often failed to take

into account that those people most at risk for skin cancer-people with fair skin and freckles (雀斑), for

example-are more likely to use sunscreen. As a result, it may appear that sunscreen users get cancer more

often.

     The studies, which generally relied on volunteers to recall their sunscreen use, were also unable to prove

how well the products had been applied, said the new study.

1. The underlined word "flaws" in the 2^nd paragraph most probably means _____.

A. evidences

B. facts

C. faults

D. failures

2. People with fair skin and freckles _____.

A. seldom use sunscreen

B. are more in danger of skin cancer

C. can be free from the harm of the sun

D. often expose themselves to the sun

3. We can learn from the passage that _____.

A. sunscreen users get skin cancer more often

B. the volunteers have proved the effect of sunscreen

C. the new study was based on the experiences of volunteers

D. the number of skin cancer patients is increasing in America

4. Which of the following can be the beat title for this passage?

A. Sunscreen to Prevent Skin Cancer

B. Sunscreen to Increase Skin Cancer

C. Skin Cancer Caused by Sunscreen

D. Skin Cancer Caused by Freckles

阴虚火旺型心悸若兼见五心烦热，梦遗腰酸者，方宜选（）。

A.朱砂安神丸

B.炙甘草汤

C.真武汤

D.天王补心丹

E.知柏地黄丸

患者男，19岁。间断右下腹痛伴低热3个月，腹痛常于进餐后加重，排便后缓解，发病来粪便呈稀糊状，无黏液、脓血。有乏力，体重下降。6个月前患强直性脊柱炎，一直服用SASP。查体右下腹有压痛。结肠镜检查显示升结肠黏膜有多发溃疡，其间可见部分正常肠黏膜；盲肠及回盲瓣溃疡形成并呈增殖样改变；回肠末端（肠镜进入约15cm）黏膜呈铺路石样并多发溃疡；活检组织中找到非干酪样肉芽肿。

对排除肠结核最没有帮助的检查是（）

A.胸部X线片

B.血清ADA

C.结核菌素试验或PPD皮试

D.血清结核抗体

E.血沉

油浸式变压器（电抗器）精益化评价细则要求：冷却装置控制线电缆芯无外露，如采用多芯软铜线，应（）。

A.压接螺栓接线柱

B.压接绝缘接线柱

C.压接开关接线柱

D.压接接线板