对锅炉化学清洗的结果的评价，主要是根据测定金属的腐蚀速度，（）和（）的水汽质量。

在中国传统的内地佛教寺院内，天王殿大肚弥勒佛背后，面向大雄宝殿的护法天神是：

A．迦兰神

B．那延罗天

C．韦陀

D．关羽

People living in different countries made different kinds of words. Today there are about fifteen hundred languages in the world, each contains many thousands of words. A very large dictionary, for example, contains thousand words. Before you leave school, you will learn only one thousand or more.

The words you know are called your vocabulary. You should try to make your vocabulary bigger. Read as many books as you can. There are a lot of books written in English for you to read. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictionary is your most useful book.

小题1:The number of different languages spoken is about 1500.

小题2:Before you leave your school, you’ll learn more than three thousand words.

小题3:You must have a large English dictionary to make you know bigger vocabulary.

小题4:If we know about five thousand words, we can read as many books as we like.

谓词公式：　　(

xT(x,y)→yR(y))→

xS(x,y)的前束范式是

A．

x

t

w((T(x,→R()→S(w,)

B．

x

t

w((T(x,→R()→S(w,)

C．

x

y((T(x,→R()→S(x,)

D．

x

T

w((T(x,→R()→S(w,)

女，60岁，全腹胀痛3个月，伴渐进性排便困难，从每日1次到2～3天大便一次，大便有黏液或带血。体检：贫血貌、腹膨隆、未见肠型、肠鸣音亢进、未及肿块，其诊断最可能是（）

A.回盲部结核

B.粘连性肠梗阻

C.溃疡性结肠炎

D.降结肠癌

E.家族性息肉病

清朝适用于宁夏、青海、甘肃等地少数民族聚居地的法规是（）。

A.《蒙古律》

B.《回律》

C.《西宁番子治罪条例》

D.《苗律》