事业单位用货币资金对外投资时，按______入账。A．固定资产原始B．评估价或合同、

下列描述中，正确的是

A．线性链表是线性表的链式存储结构
B．栈与队列是非线性结构
C．双向链表是非线性结构
D．只有根结点的二叉树是线性结构

男，溃疡病人，经常胃出血，经医院检验Hb90g／L．RBC3.8×10¹²／L，确诊为缺铁性贫血，此病的原因是（）

A.慢性失血

B.蛋白丢失

C.缺乏维生素B₁₂

D.缺乏胃蛋白酶

E.缺乏叶酸

有些植物的茎，例如桃的茎，能够不断长粗，主要是因为这些植物的茎内有

A．韧皮部

B．形成层

C．木质部

D．导管和筛管

Our house was directly across the street from the clinic entrance of John Hopkins Hospital in Baltimore. We lived downstairs and rented the upstairs rooms to the patients at the clinic.

One evening as I was fixing supper, there was a knock at the door. I opened it to see a truly awful looking man. He’s hardly taller than my eight-year-old son. “Good evening. I’ve come to see if you’ve a room. I came for a treatment this morning from the eastern shore, and there’s no bus till morning.” He told me he’d been hunting for a room since noon but with no success. “I guess it’s my face... I know it looks terrible, but my doctor says with a few more treatments...” For a moment I hesitated, but his next words convinced me: “I could sleep in this chair on the porch. My bus leaves early in the morning.”

I told him we would find him a bed. When I had finished the dishes, I talked with him. He told me he fished for a living to support his five children, and his wife, who was hopelessly crippled（残疾的）from a back injury. He didn’t tell it by way of complaint. Next morning, just before he left, as if asking a great favor, he said, “Could I come back and stay the next time?” He added, “Your children made me feel at home. ”

On his next trip he arrived a little after seven in the morning. As a gift, he brought a big fish and the largest oysters（牡蛎）I had ever seen. I knew his bus left at 4:00 a. m. and I wondered what time he had to get up in order to do this for us.

In the years he came to stay overnight with us and there was never a time that he did not bring us vegetables from his garden. I know our family always will be grateful to have known him; from him we learned how to accept the bad without complaint when facing the misfortune.

小题1:Why did the author agree to let the man spend the night in his house at last?

A．Because the man said others refused to accommodate him.

B．Because the man said he would not cause much inconvenience.

C．Because the man said he had come from the eastern shore.

D．Because the man said he had been hunting for a room since noon.小题2:How long would it take the man to travel from his home to Baltimore by bus?

A．About 1 hour．

B．About 2 hours．

C．About 3 hours．

D．About 4 hours．小题3:From the text we can know that_____________．

A．the author’s children were kind and friendly to the man

B．the man was fed up with his hard-work and his family

C．John Hopkins Hospital provided rooms-for the patients to live in

D．the author and his family were thought highly of by his neighbors小题4:The author’s family were grateful to know the man because__________．

A．he often brought them fish and vegetables from his garden

B．he paid them money for his staying

C．he taught them how to accept the bad without complaint

D．he stayed only overnight with the writer’s family

地质环境容量，可以用该特定地质空间可能承受人类排放废弃物的容纳能力来综合评价。