电流互感器在运行中为保证人身和二次设备的安全，其二次（）。A、必须一点接地； B、必

电流互感器二次侧回路可装设熔断器。（）

（10分）环境保护

中国2010年上海世博会青海馆以“中华水塔·三江源”为主题，展现中华水塔的山水风情与三江源的生态意境，引导人们寻找中 * * 母亲河的出生地，提示三江源是生命之源、文明之源和城市之源。这里生态环境脆弱，切实保护三江源的生态环境。阅读青海省的图文资料，回答问题：

（1）青海省简图上甲、乙、丙三列山脉中表示“昆仑山脉”的是________，图中A、B、C三大江河，B是________，C是___________。（6分）

（2）分析青海省成为“中华水塔”的自然地理条件。（4分）

When I was young, my parents ran a snack bar in our small town.

One evening in early April, my mother told me to fill in at the snack bar (1) a worker who had the flu. I told her I would mess it up, (2) I had never worked at the bar before. I (3) that instead of making money, I would end up owing it.

"You can do it, " said my mother, " (4) , you won’t get much business until lunch. "

"But I’ll never remember the orders, and I’m no good (5) money. Please, Mom, don’t (6) me. "

"Then I’ll help you", she said.

I shrugged my shoulders. I thought my mother’s (7) was a bad one, but I (8) .

When I got to the bar the next day, I found my mother was (9) . Because the weather that day was rainy and cold, people wanted hot snacks and drinks. (10) , I was really slow at taking the orders and making change. The line of people grew, and everybody seemed (11) , I was so nervous that my hands shook, and I (12) a cup into pieces. What a mess! Then my mother came to (13) me, and she also showed me how to make (14) If someone gave me $ 5 for something that cost $ 3.25, I handed over (15) quarters and a dollar and said, "75 cents makes four dollars, plus one dollar makes five. " Things went more (16) after that.

By the end of the day, I could remember orders, (17) the bill, and make change quickly with a smile. I was even a little (18) when the sun came out and dried up business. My mother said she was proud of me, and when she (19) that I work at the snack bar again next year, I did not even shrug. I was too busy (20) the restaurant I would open one day.

19（）。

A. thought

B. stated

C. announced

D. suggested

下列不属于白血病细胞浸润表现的是（）.

A.关节痛

B.淋巴结肿大

C.皮肤瘀斑

D.牙龈增生

假设同一名称的产品有不同的型号和产地，则计算每种产品平均单价的SQL语句是( )。

A．SELECT产品名称,AVG(单价)FROM产品GROUP BY单价

B．SELECT产品名称,AVG(单价)FROM产品ORDER BY单价

C．SELECT产品名称,AVG(单价)FROM产品ORDER BY产品名称

D．SELECT产品名称,AVG(单价)FROM产品GROU BY产品名称