患者,女性,35岁。在接受输血前进行交叉配血,其红细胞与B型血清发生凝集,其血清与B型红细胞不发生凝集。此人血型是
A型
B型
C. AB型
D. O型
E. Rh阳性
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Tina wants to be a singer __________ she is good at singing.
A. though
B. so
C. because
__________you didn't sleep last night, you may take a rest now.
A. When
B. Since
C. Once
Ability is__________ than a certificate.
A. important
B. more important
C. the most important
Harry Potter is a __________ book series written by J. K. Rowling.
A. popular
B. more popular
C. the most popular