描述某地某年流行性乙脑患者的年龄分布，宜选择的统计图是（） A.直方图 B.线图 C

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop"

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) She had only one small, flat bag with a few candies—fiftycent candies I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

17（）。

A.quiet 

B.excited 

C.happy 

D.ashamed

某男，40岁，有慢性腹泻史2年。近2个月来出现发热，体温37～38℃，腹胀腹泻、盗汗，伴右上腹疼痛，向右肩部反射。查体：肝肋下3cm，有压痛及叩击痛，血常规：白细胞13乘以十的十九次方／L，中性粒细胞81%，淋巴细胞29%。

下列哪项检查结果阴性，可基本排除阿米巴肝脓肿的诊断（）

A.血常规检查

B.粪便检查

C.脓肿穿刺液检查

D.肝功能检查

E.血清学检查

An analyst does research about Eurodollar futures. Which of the following statements is NOT accurate（）

A. Prices are quotedas 100 minus the rate priced into the contract.

B. The official Eurodollar rate is compiled by the British Bankers Association.

C. Contracts are paid off based on Euribor on a given day.

粉尘爆炸属于（）。

A.物理爆炸

B.化学爆炸

C.气体爆炸

D.固体爆炸

当管网系统中阀门的开度增加后，离心压缩机的工况点会向（）方向移动。

A.压力下降、流量上升

B.压力下降、流量下降

C.压力上升、流量上升

D.压力上升、流量下降