投资者买卖ETF须用A股账户，投资者申购、赎回须用A股账户或基金账户。 ( )

Do you think which language is ______, Japanese or English?            

A. difficult               B. the most difficult    C. more difficult

男，57岁，腰、肩痛数年，发现蛋白尿1周入院。无水肿，血压正常。尿常规蛋白+++，红白细胞少量，血红蛋白50g/L，血尿素氮1O.65mmol/L，肌酐230.85μmol/L。血钙12.00mg/dl(3.00mmol/L)，血沉60mm/h，血碱性磷酸酶正常。(1)要考虑哪些疾病?(2)进一步做哪些检查才能确定诊断?

The millions of calculations involved, had they been done by hand, () all practical value by the time they were finished.

A. had lost

B. would have lost

C. would lose

D. should have lost

生活中处处有化学．你知道下列化学原理吗？

（1）衣服上沾上油污时，可用洗涤剂或汽油除去，其中洗涤剂除油的原理是______；

（2）图书、档案、贵重设备、精密仪器等处的失火，可用二氧化碳灭火器来扑灭，其原理是______；

（3）燃煤时，将煤球做成蜂窝煤的原因是______．

前后腭杆间的距离应大于

A．5mm
B．20mm
C．10mm
D．15mm
E．25mm