只有把核心技术掌握在自己手中，才能真正掌握（）的主动权，才能从根本上保障国家经济安全

阅读表达。

     A young man couldn't sleep well every night. He was very worried. One day he went to see the

doctor. The doctor looked him over carefully. But nothing wrong with him. The doctor told him to

count from l to 10 again and again. " Keep doing it until you fall asleep," the doctor said.    

     After a few days,the young man came to the doctor again. But to his surprise,the doctor found the

young man was even worse than before! "Didn't you count as I told you?" the doctor asked. "Yes,I did,"

the young  man answered. " But every time when I reached eight,I couldn't help jumping from bed. "        

     " But why?" the doctor wanted to know. The young man said,"I  am a boxer(攀击运动员 ). "

根据短文内完成下列各题。

l. The young man had to go to see a doctor because___________________________

2. Was there anything wrong with the young man?

    ___________________________

3. The doctor told the young man to___________________________

4. The young man came to the doctor again because___________________________

5. What is the young man?

    ___________________________

每个公民都应该有安全意识，今年频繁发生的有关化学品泄漏或爆炸事件一次又一次给我们敲响了警钟。下列做法存在安全隐患的是[ ]

①将水沿着烧杯内壁缓缓加入浓硫酸中，并用玻璃棒不断搅拌；

②给试管中液体加热时，应将试管倾斜，与桌面成45°角，再集中在药品处加热；

③取用金属Na或K时，用剩的药品要放回原瓶；

④夜间厨房发生液化气（烷烃混合物）泄漏时，应立即开灯检查液化气泄漏原因，并打开所有门窗通风；

⑤废旧电池应回收处理。

A．全部        

B．①②④　    　

C．①③⑤　  　　

D．①④⑤

体重9kg，身长75cm，胸围46cm，头围46cm，该小儿年龄可能是()

A．8个月

B．9个月

C．10个月

D．1岁

E．2岁

对子胃黏膜有长腺化生和轻度不典型增生的患者，以下治疗措施中哪项不必采取

A．β胡萝卜素
B．维生素C和叶酸
C．定期随访
D．预防性胃切除手术
E．耐心解释消除恐癌心理