To our delight， this new smoke alarm system can effectively ______ very weak signals.（ ）
A: attract
B: relate
C: detect
D: evolve
A: attract
B: relate
C: detect
D: evolve
举一反三
- To our delight, this new smoke alarm system can effectively ______ very weak signals.
- To our delight, this new smoke alarm system can effectively ____ very weak signals. A: diagnose B: detect C: eliminate D: trace
- To my delight, this new smoke alarm system can effectively ____very weak signals. A: find B: catch C: detect D: match
- Smoke alarm is very important.
- A voltage comparator can convert analog signals into digital signals. A: Correct B: Wrong