下列哪项不是对恶性肿瘤细胞基本形态特征的描述()。
A.肌动蛋白丝减少
B.微管变短
C.核分裂相多见
D.核质比显著高于正常细胞
E.形态特征与其来源细胞完全相同
参考答案:E
Had they known what was coming next, they second thoughts.
A.may have
B.could have
C.must have had
D.might have had
人造光卤石(KCl•MgCl2•6H20)是盐化工生产的中间产物.以光卤石为原料制得金属镁,可有下列步骤:
①过滤 ②溶解 ③加入适量Ca(OH)2 ④蒸发 ⑤用盐酸溶解 ⑥电解熔融MgCl2 ⑦在HCl气流中强热MgCl2•6H20晶体
正确的顺序是( )
A.⑤③①②④⑥⑦
B.②③①⑤④⑦⑥
C.②④①③⑦⑤⑥
D.⑤③①④②⑦⑥