下列說法中正確的是……（ ）

      A、鎂的原子質(zhì)量就是鎂的相對原子質(zhì)量

      B、一個氧原子的實際質(zhì)量約等于16/6.02×10²³ g

      C、水的相對分子質(zhì)量等于18g

      D、二氧化硫的摩爾質(zhì)量是64g

—— Do you mind my opening the window? It’s a bit hot in here. 

    —— ______ , as a matter of fact

A. Go ahead      B. Yes, my pleasure

C. Yes, I do      D. Come on

What I need is_____ book that contains ______ABC of oil painting. 

A. a; 涓嶅～        B. the; 涓嶅～     C. the; an     D. a ; the

下列文字表述與反應(yīng)方程式對應(yīng)且正確的是（   ）

A．溴乙烷中滴入AgNO₃溶液檢驗其中的溴元素：Br^-+Ag⁺==AgBr↓

B．用醋酸除去水垢：CaCO₃ + 2H⁺==Ca²⁺ + H₂O + CO₂↑

C．利用腐蝕法制作印刷線路板：Fe³⁺ + Cu == Fe²⁺ + Cu²⁺

D．實驗室用液溴和苯在催化劑作用下制溴苯：

It is often ______ that human beings are naturally equipped to speak.

A. said       B. to say     C. saying     D. being said

Charles was alone at home, with_______ looking after him.

A. someone   B. anyone     C. not one   D. no one

My friend showed me round the town, ______ was very kind of him.

A. which         B. that         C. where        D. it

The children loved their day trip, and they enjoyed the horse ride ______.

A. most       B. more     C. less         D. little

—— Do you mind my opening the window? It’s a bit hot in here. 

    —— ______ , as a matter of fact

A. Go ahead      B. Yes, my pleasure

C. Yes, I do      D. Come on

下列詞語中加點字的讀音，完全相同的一組是

A．劃槳    劃算    劃價    劃一不二    B．著裝    著眼    著落    著手成春

C．抹殺    抹黑    抹粉    轉(zhuǎn)彎抹角    D．妥帖    請?zhí)?nbsp;   字帖    服服帖帖