化妆品中对()规定限量要求
A．汞、砷、铅、甲醛
B．汞、砷、铅、甲醇
C．汞、砷、铅、镍
D．镍、汞、砷、甲醇
E．镍、汞、砷、甲醛
参考答案：B
（A）笑笑晚上在灯下看书，顽皮的弟弟跑过来按了10下开关，这时灯是______的；如果再按21下开关，这时灯是______的．（填“亮”或“不亮”）
. — At present we students have access to many valuable English websites to learn English.
— As far as I know, English on line.com is a free site ______ visitors can not only learn the English language but also chat on line.
A．where
B．which
C．that
D．what
