A smart home: a) 3) ________ that understand where people are and what they’re doing. b) tunable LED lighting saves maybe 30, 40 percent in 4) ______.
举一反三
- At work, I'm surrounded people who don't know what they're doing.
- At work, I'm surrounded ______ people who don't know what they're doing. A: for B: by C: with
- At work, I’m surrounded （ ） people who don’t know what they’re doing. A: of B: by C: to D: in
- In an economy, 43 million people are employed, 3 million are unemployed, and 4 million are not in the labor force. What is the employment-to-population ratio? A: 86 percent B: 92 percent C: 93 percent D: 6.5 percent
- The doctors are busy doing what they can________ the dying man. A: saving B: save C: to save D: saves