气化炉筒体耐火材料包括()。
A.向火面砖(或高铬砖)
B.背衬砖(或铬刚玉砖)
C.隔热砖(或氧化铝空心球砖)
D.浇筑材料
参考答案:A, B, C, D
—Mary’s score on the test is the highest in her class.
—Really? She have studied very hard.
A.may
B.ought to
C.must
D.should
箭头所指的解剖结构是()
A.上髓帆
B.第六脑室
C.胼胝体体部
D.枕叶
E.丘脑侧块