【单选题】The author feels that the number sense displayed by Genus Eumenus is ______.
A.
more remarkable than that of a crow
B.
less convincing an instance than that displayed by the crow
C.
actually not an instance of what the author is discussing
D.
restricted to the female of this species
【简答题】钢铁是使用最多的金属材料。下图实验装置是模拟炼铁的实验。其中A是实验室用草酸(H 2 C 2 O 4 )和浓硫酸加热分解产生CO。E是利用得到一氧化碳还原氧化铁得到铁。 (提示:浓硫酸具有吸水性;草酸分解化学方程式:H 2 C 2 O 4 H 2 O+CO 2 ↑+CO↑) 请回答下列问题: ①C装置无明显现象,C装置的作用是 (11) 。 ②E装置中的实验现象是 。 ③F装置的作用是 。
【单选题】The author feels that______.
A.
the personalities of athletes produce violent confrontations
B.
athletes should not have to accept unnecessary physical abuse
C.
athletes' salaries are already too high
D.
athletes need higher salaries to compensate for their injuries
【简答题】About the future of the arts of reading the author feels ________. A) upset B) uncertain C) alarmed D) pessimistic
【单选题】About the future of the arts of reading the author feels ______.