大气圈中,污染最严重的是出现在哪一层?()
A. 对流层
B. 平流层
C. 中间层
D. 电离层
火炬气回收和利用,消除了火炬引起的()等环境污染。
A. 烟
B. 光
C. 噪音
D. 排出废气
某远离海洋的山区,一幼儿表现为头大、额短、面方、眼裂水平、眼距宽、塌鼻梁以及唇厚舌方、流涎等特殊面容。下列食物中富含该幼儿所缺元素的是()。
A. 十字花科蔬菜
B. 全谷食品
C. 海产品
D. 豆类及制品
E. 橙色水果
How will EIGRPv6 react if there is an IPv6 subnet mask mismatch between the Global Unicast addresseson a point-to-point link?()
A. EIGRPv6 will form a neighbor relationship.
B. EIGRPv6 will not form a neighbor relationship.
C. EIGRPv6 will form a neighbor relationship, but with the log MSG: "EIGRPv6 neighbor not on a commonsub net."
D. EIGRPv6 will form a neighbor relationship, but routes learned from that neighbor will not be installed inthe routing table.