Mr. Scott has been asked to bring ______ copies of the employment contract for the performance evaluation meeting tomorrow.
A. he
B. his
C. him
D. himself
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Regrettably, ______ who don"t have valid identification cards are not allowed to enter the company head office for security reasons.
A. that
B. those
C. this
D. these
红外线是太阳光线中众多不可见光线的一种,由德国科学家霍胥尔于1800年发现。它之所以不能被人看到是因为______。
A. 超出了可见光谱范畴
B. 低于视觉刺激阈限
C. 不能刺激锥体细胞
D. 不能刺激棒体细胞
First Royal Bank sent a letter to its customers ______ the revised credit card policy.
A. concern
B. concerns
C. concerned
D. concerning
SLE患者不会出现的血液学异常是
A. 血红蛋白减少
B. 网织红细胞减少
C. 白细胞减少
D. 淋巴细胞减少