适用于电机容量较大且不允许频繁启动的降压启动方法是（）。A、Y一△B、自耦变压器C、

分部工程流水施工是______。

A．细部流水
B．专业流水
C．综合流水
D．前三者都不是

Read the passage and fill in the blanks with proper words. (14分)

You know that eating a sensible diet and getting plenty of exercise help make your body healthy and strong. But do you know that there are ways to make your brain healthier and smarter? Here are seven steps toward a smarter brain.

Limit your TV viewing

Never spend too much time on TV viewing, for it n__小题1:__ very little brain activities. Your brain will become weak just as your muscles do. If you do watch TV, choose something educational and meaningful.

Travel

Travelling to a____小题2:__ country forces you to see and do things in a fresh way, bringing stimulation to the brain. Learn a new language

Learning a new language involves different learning methods. Learning a language sharpens your brain and helps prevent memory p___小题3:___ that you may meet in later years.

Read often

As you read, take the time to look up people or places that aren’t familiar. Reading makes your vocabulary much l___小题4:__ if you always search for words and definitions that you don’t know. Each week, choose an animal, a bird or fish, and read everything you can about it. Stretch your brain as you become an expert on the subject.

Calculate w_____小题5:___ you shop

As you put things in your grocery cart, total everything in your head. See how close you get to the actual total.

Use your non-dominant（不占优势的）hand

If you are right-handed, use your left hand for everyday activities, or use your right hand if you are left-handed. Doing familiar things in a different way will make your brain c____小题6:__ new neural （神经）networks.

Wechat（微信）!

Read messages from people who has different interests. And some say that learning to express y____小题7:___ in just 100 words is a great brain challenge.

Have a try and do these every day. Little by little you can get into the habit of challenging your brain, and make your brain smarter!

4岁男孩，不爱动，腹胀、便秘，身高78cm，智力落后，面色苍黄，鼻梁宽而平，舌大伸出口外，腕部摄x线片见骨化中心2个，应给予哪种治疗（）

A.长期服用碘制剂

B.给予低苯丙氨酸饮食治疗

C.终身服用甲状腺制剂

D.应用维生素D及钙剂

E.长期进行精神运动训练指导

有一白色固体粉末可能是碳酸钠、亚硫酸钠、硫酸钠中的一种或二种，某兴趣小组拟对该样品进行探究．

（1）取少量样品溶解于水，测定溶液的pH，若测得溶液的pH=7，则样品中一定含有______，一定不含______；

（2）如果要检验该样品是否含有硫酸钠，请简要说明检验的方法、现象和结论：______；

（3）取适量固体样品加入过量盐酸中，有气体放出．若要检验放出气体的组成，从以下限定试剂中选择合适的试剂设计一个组合实验分析该混合气体的组成，简要写出实验方案、现象和结论．

限定试剂：品红溶液、澄清石灰水、酸性KMnO₄溶液、氢氧化钠浓溶液、饱和NaHCO₃溶液．

医院健康教育的目标人群（广义概念下的医院健康教育）为（）

A.患者及其家属

B.患者、家属及陪护人员、医护人员与职工、社区人群

C.患者、家属及陪护人员

D.患者及社区群众

E.医护人员及社区人群