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问题 选择题

It was brave ________him to jump into the river to save the child and it’s important

________ him to help others.

A．for; for

B．of; of

C．for; of

D．of; for

答案

答案：D

题目分析：句意：他真是勇敢跳进河里救那个孩子，而且对他来说，重要的是帮助其他人。根据句型It is+表示人物性格的形容词+of sb. to do sth.“某人做某事具有某种品质”，It is+表示描述事物的形容词+for sb. to do sth.“做某事是怎么样的”。第一空 根据brave，可知此处是描述人的形容词，故用介词of。第二空根据important，可知此处是描述事物的形容词，故用介词for。故选D。

单项选择题

Scientists around the world are racing to learn how to rapidly diagnose, treat and stop the spread of a new, deadly disease. SARS — Severe Acute Respiratory Syndrome — was (1) for the first time in February 2003 in Hanoi, (2) since then has infected more than 1,600 people in 15 countries, killing 63. At this (3) , there are more questions than answers surrounding the disease.

Symptoms start (4) a fever over 100.4 degrees F, chills, headache or body (5) . Within a week, the patient has a dry cough, which might (6) to shortness of breath. In 10% to 200% of cases, patients require (7) ventilation to breathe. About 3.5% die from the disease. Symptoms (8) begin in two to seven days, but some reports suggest it (9) take as long as 10 days. Scientists are close to (10) a lab test to diagnose SARS. In the meantime, it is diagnosed by its symptoms. There is no evidence (11) antibiotics or anti-viral medicines help, (12) doctors can offer only supportive care. Patients with SARS are kept in isolation to reduce the risk of (13) . Scientists aren’t sure yet, but some researchers think it’s a (14) discovered coronavirus, the family of viruses that cause some common colds.

Most cases appear to have been passed (15) droplets expelled when infected patients cough or sneeze. Family members of infected people and medical workers who care for them have been most likely to (16) the illness. But recent developments in Hong Kong suggest that the (17) might spread through air, or that the virus might (18) for two to three hours on doorknobs or other (19) Health experts say it is (20) , though, that sharing an elevator briefly with an infected person would be enough to pass the virus.

4（）

A.from

B.over

C.upon

D.with
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单项选择题

轧制速度、盘重、（）是高速线材轧机的三个相关的基本工艺参数。

A、开轧温度

B、坯料断面

C、轧制道次

D、终轧温度
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