A:大于52
B:小于52
C:等于6
—不在,他还在办公室工作。
—Is your father at home?
—N0,he is still____ ____in his office.
居里夫人,您认为成才的窍门在哪里?居里夫人肯定地说:“恒心和自信心,尤其是自信心。”可见 ( )