水轮机的总效率η包括（）、（）、（），其关系是η=ηj·ηv·ηs。
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回答问题。
1．在中国古代书法家中，“颜、柳、欧、赵”号称“楷书四大家”，你知道他们的姓名与所处朝代吗？
颜：________ ________ 柳：________ ________
欧：________ ________ 赵：________ ________
2．东晋时期有一位大书法家，成就极高，成为书法百代楷模，人称“书圣”。他的儿子在他的熏陶下书法成就也很高，父子合称“二王”。他们是谁？请写出姓名。
父：______________ 子：______________
3．“文房四宝”指哪四种文具？
________ ________ ________ ________
肝癌血行肝外转移最多见于（）。
A.肾
B.胰
C.脑
D.肺
E.胃
1992年，大陆海协会与台湾海基会达成的重要共识是 [ ]
A、和平方式统一祖国
B、“海峡两岸均坚持一个中国原则”
C、一个国家，两种制度
D、海峡两岸实行“通邮、通航、通商”
Are your table manners much better when you are eating at a friend’s home or in a restaurant than they are at your own home? Probably so, __1__ you are aware that people judge you by your table manners. You take special pains when you are eating __2__. Have you ever stopped to realize how much less self-conscious you would be on such occasions if __3__ table manners had become a habit for you? You can make them a habit by __4__ good table manners at home. Good manners at mealtimes help you and those around you to feel __5__. This is true at home as much as it is true in someone else’s home or in a restaurant. Good __6__ make meals more enjoyable for everyone at the table. By this time you probably know quite well what good table manners are. You __7__ that keeping your arms on the table, talking with your __8__ full, and wolfing down your food are not considered good manners. You know also that if you are mannerly, you say “Please” and “Thank you” and ask for things to be passed to you. Have you ever thought of a pleasant attitude as being __9__ to good table manners? Not only are pleasant mealtimes enjoyable, but they aid digestion. The dinner table is a __10__ for enjoyable conversation. It should never become a battleground. You are definitely growing in social maturity (成熟) when you try to be an agreeable table companion.
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女性，70岁，5年前经过超声心动图诊断为扩张型心肌病，平时无症状。该患者应当长期服用的药物是（）.
A.地高辛
B.呋塞米（速尿）
C.硝酸盐
D.螺内酯（安体舒通）
E.β受体阻滞剂