有一金属块质量是386g，体积是20cm3，这种金属的密度是__________

女，65岁。从10年前开始每年冬季都有咳嗽、咳痰、呼吸困难、气喘等症状。近2年加重，稍微活动就会出现气短症状，体重减轻，并有轻度贫血，吃海鲜会出现呼吸急促的症状。该患者现在每天服用茶碱药物，病情有所缓解。

比较合理的食物选择（）

A.猪肉、豆制品、萝卜、水果

B.鸡肉、牛奶、姜、苹果

C.猪肉、豆腐、辣椒、冬瓜

D.鱼、虾、牛肉、蘑菇

E.猪肉、牛肉、萝卜、梨、咖啡

离心泵的性能参数只要有（）、扬程、转速、功率、容许吸入真空度。

男，18岁，右手背部深Ⅱ度烧伤10天，近一天出现乏力、头痛及张口困难，不恰当的诊治措施是（）。

A.手背部烧伤部位清创

B.TAT2万U静脉注射

C.腰穿脑脊液检查

D.白蛋白20g静脉注射

E.10%水合氯醛30ml保留灌肠

工程施工合同初验后，可以支付至合同价70%的进度款。

Most people have no idea of the hard work. One of the questions that is always asked of me is (1) I became an animal collector in the first (2) .The answer is that I have always been interested in animals and zoos. According to my parents, the first word I was able to say with any (3) was not the conventional "mamma" or "daddy", (4) the word "zoo", which I would (5) over and over again with a shrill (6) until someone, in order to (7) me up, would take me to the zoo. When I (8) a little older, we lived in Greece and I had a great (9) of pets, ranging from owls to seahorses, and I spent all my spare time (10) the countryside in search of fresh specimens to (11) to my collection of pets.(12) on I went for a year to the City Zoo, as a student (13) , to get experience of the large animals, such as lions, bears, bison and ostriches, (14) were not easy to keep at home. When I left, I (15) had enough money of my own to be able to (16) my first trip and I have been going (17) ever since then. Though a collector’s job is not an easy one and is full of (18) , it is certainly a job which will appeal (19) all those who love animals and(20) .

第（17）空应选择（）

A．normally

B．regularly

C．usually

D．often