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【多选题】
精细农业系统基于( )等实现短程、远程监控。A.
Zigbee 网络
B.
GPRS网络
C.
Internet
D.
CDMA
手机使用
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举一反三
【单选题】William Byrd composed many pieces of music, but his Latin church music is considered his most ____work.
A.
junior
B.
glorious
C.
senior
D.
studious
【单选题】William Byrd composed many pieces of music, but his Latin church music is considered his most ________ work.
A.
junior
B.
typical
C.
dumb
D.
glorious
【多选题】简单控制系统中,选择被控变量的原则有
A.
尽量采用直接指标作为被控变量。当无法获得直接指标信号，或其测量和变送信号滞后很大时，可选择与直接指标有单值对应关系的间接指标作为被控变量。
B.
被控变量应能被测量出来，并具有足够大的灵敏度。
C.
被控变量应是非独立可控的。
D.
被控变量在工艺操作过程中经常要受到一些干扰影响而变化。为维持其恒定，需要较频繁的调节。
E.
选择被控变量时，必须考虑工艺合理性和国外仪表产品现状。
F.
被控变量应能代表一定的工艺操作指标或能反映工艺操作状态，一般是工艺过程中较重要的变量。
【单选题】William Byrd composed many pieces of music, but his Latin Church music is considered his most work.
A.
spacious
B.
enormous
C.
glorious
D.
hazardous
【简答题】配合性质取决于孔和轴公差带之间的 位置,孔和轴的公差带各有 种(写数字),其公差带位置由基本偏差确定,它们的基本偏差系列图相对零线对称,孔的公差带位置按字母顺序从 到 (填“高”或“低”)穿越零线,轴的公差带位置按字母顺序从 到 (填“高”或“低”)穿越零线。
【单选题】William Byrd composed many pieces of music, but his Latin church music is considered his most .
A.
glorious
B.
typical
C.
junior
D.
dumb
【单选题】William Byrd composed many pieces of music, but his Latin church music is considered his most __work.
A.
glorious
B.
hysterical
C.
typical
D.
junior
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